refactor: rename email-server-worker to email-worker

Rename directory from email-server-worker to email-worker for clarity and brevity. Update all references in CLAUDE.md documentation.

email-worker/Dockerfile

@@ -0,0 +1,75 @@
+#-------------------------------------------------------------
+# Build command: docker build . -t pr-d-registry.ngit.hr/ngit/evo-open-table-sync-svc:1.0.0
+#-------------------------------------------------------------
+
+#--------------------------------------------
+# Stage: building TypeScript
+#--------------------------------------------
+FROM node:18 as build-stage
+
+ENV WORKDIR=/app
+WORKDIR /app
+
+# kopiram SSH key & known_hosts koji su potrebni za `npm i`
+# zato što `package.json` pri instalacija NGIT paketa koristi
+# SSH autentikaciju
+COPY _docker_assets/.ssh /root/.ssh
+RUN chmod 700 /root/.ssh/*
+
+COPY ./package*.json ./
+
+# instaliram pakete
+RUN npm i && npm cache clean --force
+
+COPY ./tsconfig.json ./
+COPY ./src ./src
+RUN npm run build
+
+#--------------------------------------------
+# Stage: instaliram produkcijski node_modules
+#--------------------------------------------
+FROM node:18 as package-stage
+
+WORKDIR /app
+
+COPY ./package*.json ./
+
+# instaliram SAMO produkcijske
+RUN npm i --only=production && npm cache clean --force
+
+#--------------------------------------------
+# Stage: priprema finalnog image-a
+#--------------------------------------------
+FROM gcr.io/distroless/nodejs:18 as assembly-stage
+
+WORKDIR /app
+
+ARG PORT="3000"
+ENV PORT=${PORT}
+
+# prometheus config
+ARG PROMETHEUS_APP_LABEL
+ENV PROMETHEUS_APP_LABEL=${PROMETHEUS_APP_LABEL}
+
+ARG PROMETHEUS_HISTOGRAM_BUCKETS
+ENV PROMETHEUS_HISTOGRAM_BUCKETS=${PROMETHEUS_HISTOGRAM_BUCKETS}
+
+# (optional) logiranje na stdout (moguće opcije: "server:server", "server:metrics", "server:healthcheck" )
+ARG DEBUG
+ENV DEBUG=${DEBUG}
+
+# kopiram node-modules
+COPY  --from=package-stage /app/package*.json ./
+COPY  --from=package-stage /app/node_modules ./node_modules
+
+# kopiram buildane datoteke
+COPY  --from=build-stage /app/build/ ./server
+
+# server vrtim pod ograničenim "nobody" korisnikom
+USER nobody:nobody
+
+HEALTHCHECK --interval=30s --timeout=3s --start-period=10s \
+   CMD ["/nodejs/bin/node", "./server/healthcheck.js"]
+
+# pokrećem server
+CMD ["./server/entry.js"]